Flushing device



June 8, 1926.

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` D. M. FORFAR FLUSHING DEVICE Filed June 29, 1925 2 Sheets-Sheet 2Patented June 8, 1926.

UNITED STATES DONALD M. FORFAR, 0F MINNE'APOLIS, MINNESOTA.

FLUSHING DEVICE.

Application led June 29, 1925. SeraI No. 40,380. n

My present invention relates to a flushing device for plumbing ixturesand the like and more particularly to an auxiliary pilot valve forcontrolling a water-operated main or iushing valve, and to this end,generally stated, the invention consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a view partlyv in diagram and partly in section illustrating atoilet room having spaced inner and outer walls, and also illustratingin said room a urinal and the flushing device therefor; v

Fig. 2 is a view, principallyin section, of the flushing valve;

Fig. 3 is a view, principally in section, of the auxiliary pilot valveand floor box in which it is mounted with a conduit leading therefrom;and

Fig. 4 is a plan view of the parts shown in Fig. 3, with the cover ofthe 'floor box removed;

The numeral 5 indicates what may be assumed to be a toilet roomliavingspaced inner and outer walls 6 and 7 which afford therebetween a pipespace 8, and the finished floor of said toilet room is indicated by thenumeral 9. Vithin the toilet room 5 is a urinal 10 supported on thefloor 9 against the inner wall 6. Extending into the pipe space 8 is acold water supply pipe 11 leading from any suitable source of supplyunder pressure and tapped' into the lower end ot an upstandingcylindrical valve casing 12 for a water supply chamber 13. The casing 12is open at its top, and its upper edge affords a valve seat 14.Surrounding the valve casing 12 is a water discharge chamber 15, thecasing 16 of which, at its bottom, is integrally formed with the lowerend of the valve casing 12, and the top of which is open and extendsslightly above the valve seat 14. A dome-like cover 17 for the casing 16is detachably bolted to the top thereof and the. interior of said coveraffords a water pressure chamber 18. A water discharge pipe 19 leadsfrom the casing 16 through the inner wall 6 with its delivery endarranged to iiush the urinal 1() in the customary manner.

The open top of the water supply chamber 13 is normally closed t0 thewater discharge chamber 15 by a water-operated diferential main orflushing valve 20, the small area of which is in said chamber 13 and thelarge area of which is in the pressure chamber 18. A pliable packing 21,secured in a peripheral groove in the valve 20, normally rests on thevalve seat 14 and forms a water tight joint between the chambers 13 and15. When the flushing valve 20 is open,

water may flow through the open top of the water supply chamber 13 intothe water discharge chamber 15. The flushing valve 20 is carried by adiaphragm 22 formed with the pliable packing 21 and secured in positionby having its outer marginal edge portion clamped between the casing 16and cover 17.

The diaphragm 22, pliable packing 21 and the small area of the valve 20afford a partition which closes both chambers 13 and 15 to the waterpressure chamber 18. A constantly open axial port 23 extends completelythrough the flushing valve 20 and connects the water-supply chamber 13to the water pressure chamber 18. Integrally formed with the small areaof the iushing valve 20 is a depending hollow stem 24 which extendsloosely into the water supply chamber 13 and guides said valve duringits opening and closing movements. Formed in the upper end of the stem.24 is a plurality of circumt'erentially spaced ports 24 for the escapeof water -trom the hollow stem 24 into the water 4discharge chamber 15when the iiushing valve 2O is open.

A rectangular metal box 25 is set into the ioor 9 with its upper edgeflush therewith and located outward of the urinal 10. This box 25 isprovided with a displaceable cover 26 held in position by a plurality ofscrews. An iron conduit 27 is laid under the floor 9 and leads from thepipe space 8 to the floor box 25.

An lauxiliary pilot valve assembly 28 is loosely and removably mountedin the loor box 25 and includes a casing 29 having a square base 30which rests on the bottom of the box 25 and is of such size as toprevent horizontal shifting movement of said assembly in the box 25.Formed in the casing 29 are upper and lower recesses 31 and 32,respectively, connected by a restricted passageway 33, and which lowerrecess 32 is normally closed by a screw plug 34 and affords a waterpressure chamber 35. The casing 29, at the top of the water pressurechamber 35, is beveled to afford a valve seat 36 for a valve 37 whichnormally closes the water pressure chamber 35 to the passageway Thevalve 37 is secured to the lower end of an upright valve stem 33 whichis mounted for endwise movement in a seat 39 formed in the lower end ofa head block 40 removably .mounted in the upper recess 31. This headblock 40 is -held in the recess 31 by a clamping ring 41 havingscrew-thread ed engagement with the valve casing 29 and engages anannular rib 42 on the head block 40 above the casing 29 and draws saidhead bloclzonto a gasket on the bottom of said recess to iorm a watertight joint.

A push button 43 is secured to the upper `end of the valve stem 33 andmounted in a recess 44 formed in the upper end oi'f the head block '40and works through an aperture 45 in the box cover 26 and normallyprojects thereabov'e. A packing glanc 4G yfor the valve stem 33 ismounted in the head block 40, between the seat 39 and recess 44. Thispacking gland is held compressed around the valve stem 38 by awasher-like follower 47 on said valve stem. A coiled spring 43is-compressed between the follower 47 and push button 43 and yieldinglyand knormally holds said push button raised and the valve 37 on itsseat36.

'The water pressure chamber 35 oi' the auxiliary pilot valve assembly 23is connected to the waterpressure chamber 13 by a flexible copper tube49 and a port 50. @ne end oi' the tube 49 is tapped into the top of thecover 17 and its other end is tapped into the casing 29 on the oppositeside thereof from Ythe conduit 27 and port 5() formed in the casing 29.A flexible copper tube 51 and a port 52 ailiord awaste connection `fromthe water-pressure 35 to a sewer pipe located'in thepipe space 8. Oneend oi the tube l51 is tapped into the casing 29 directly above the tube49 and its other end is connected to the sewer pipe 53, and the port 52is formed in 'the lcasing 29. Both tubes 49 and 51 extend :trom the box25 through the conduit 27 to the pipe space 3, and have separable jointsat a point wherethey enter said floor box from the conduit 27, and thesections ot said tubes are connected by unions 54. The purpose ofproviding these separable joints is to permit the auxiliary pilot valveassemblyto be detached from the tubes 49 and 51 and removed from theHoor box 25101' inserted therein without disturbing `said tubesin theconduit 27. The purpose o'l" connecting the tubes 49 and 51 on theopposite side of the casing 29 to the conduit 27 and bending thesamearound said casing ist@ allow forv expansion and contraction and I.forany variation made'in their length due to cutting. By mounting the tubes49 and 51 in a conduit 27, they can easily be removed for the purpose otrepairs and then relaid or new ones substituted therefor withoutdisturbing the ioor or plumbing fixtures. A hand-controlled eut-oliAvalve 55 is interv posed in the cold water supply pipe 11, ad-

jacent to the casing 16, a hand-controlled cut-off valve 56 isinterposed in the water pressure tube 49 in the vicinity of said cas ing16, and a hand-controlled cut-o valve 57 is interposed in the waste tube5l at a point after it leaves the conduit 27.

Normally the cut-oit valves 55, 56 and 57 are open and the valves 20 and37 are closed, the latter ot which Vis held closed by the spring 48 andthe former of which vis held closed by the water pressure in the chamber18 on the side of said valve having the greatest area. To flush theurinal 10, it is yonly necessary to step on the push button 43 to openthe valve 37 against the tension of the spring 40 and thereby releasethe water pressure in the chambers 18 and 35 and conduit 49 and permitthe same to waste through the port 52 and conduit 51 to the sewer 53 orother receptacle. lith the release of the water pressure on the side ofthe iiushing valve 20 having the greatest area, the water pressure inthe chamber 13 will then open said valve and permit water to iiow fromthe chamber 13 and waterpipe 19 and flush the urinal 10. This flushingaction will continue as long as the push button 43 is held depressed.

' Then the push button 43 isreleased, the compressed spring 40 willclose the valve 37 and thereby start the building up of a water pressurein the chamber 18 through 'the port 23 :Eromthe chamber 13. As -soon asthis chamber 18, water conduit 49 and chamber 35 are filled with water,the-pressure thereof on the side of the'flushing valve 2O in the chamber13 and having the greatest area will close said valve against the waterpressure in the chamber '13 and thereby prevent further How of `saidwater from said chamber 13 to the chamber 15 and stop the flushingaction.

1While the flushing device is shown in connection with a urinal, itis ofcourse understood that the same is equally well adapted for use inconnection with various diiterent plumbing `i'ixtures to be flushed. Insome instance, it might be desirable to motmt the auxiliary pilot valvein a wall box instead ot a tloor box.

Vfhat l claim is:

1. An embedded cover-equipped iioor or wall box located at a distantpoint `from a Iiushing valve, a concealed conduit between the box andilushing valve, a removable water pressure tube .leading from theflushing valve and extending throughthe conduit to the box, an auxiliarypilot valve assembly removably mounted in the box and having anactuating push button extending through an aperture in the cover of thebox, and a separable coupling connecting` said tube to 6 the auxiliarypilot valve assembly outward thereof.

2. The structure defined in claim 1 in further combination with a WasteWater tube extending from the box through the conduit, and a separablecoupling connecting the 10 Waste Water tube to the auxiliary pilot Valveassembly outward thereof.

In testimony whereof I affix my signature.

DONALD M. FORFAR.

